Nut lock



Patented Apr. 6, 1926.

' 1,579f,62e I 'I :UNITED STATES,

PATENTVOFFICE.

DIEL o. Kana, or sALnmonEGoN. i

Nu'r Loox. lv

-App1icatin fileaappn 21, 1925. seriai No. 24,885.

hereby declare'thefollowing to be a full,

clear, and eXact description of the invention, such as will enable others .skilled in the art to which it appertains to make and use` the same.

This inventionrelates to new and useful improvements in nut locks.

One object of the invention is to provide a device for holding a nut tightly against the Work, and whereby the nut will be advanced against the work upon wea-ring of the portion of the work engaged by the nut.

Another object is to provide a spring means for urging the nut againstthe jwork, and means for regulating the tension of the spring means. I

Other objects and advantages will be apparent from the following description when taken in connection with the accompanying drawing.

In the drawing:

Figure' 1 is an elevation of the nut lock in applied position.

Figure 2 is a transverse sectional view on the line 2-2 of Figure 1, looking in the direction of the arrow.

Figure 3 is a transverse sectional view on the line 3-3 of Figure 1, looking in the direction of the arrow. i v

Figure 4 is a view similar to Figure 1, showing a modified form of the lock.

Referring particularly to the accompanying drawing, 10 represents a bolt which is disposed througlnthe work 11, and has the nut 12 ,engaged thereon and against'the work. Encircling the threaded portion of the bolt, outwardly of the nut 12,' is a coil spring 13, one end of which is bent into a square frame 14:, which closely embraces the nut. Threaded on the bolt,outwardlyof theother end of the coil spring 13, is a nut 15, and'pivotally mounted on the inner face of this nut 15, is a pawl 16. The inner end of the pawl is formed with a toothed face 17, which engages with the threads of the bolt, while the other end of thepawl is formed with a hook 18, lwith which is engaged the hooked end 19, of the coil spring 13. The hooked end of the spring is provided with an extension 19', formed for engagement by a suitable.

tool to disengage the hooked end from the pawl. Thepawl engages with the. threads of the bolt in a direction to prevent retrograde movement of the nut 15, so that/when i the said nut is rotated forwardly, on the` bolt, the engaged end of the spring will be moved to wind the spring, wherebypto increase the tension thereof, and cause the nut' 12 to turn more closely into engagement with the work.

After the nut 12 has been properly driven up against A,the work, the nut 15 is turned to place the spring under tension, 'thereby producingV a forward urging action on the nut 12, which will keep said nut tightly against the work. Should the work face wear, to

Asuch an extent as to cause the nut 12 to be-VV come loose with respect thereto, the tension of the spring will cause the nut 12 tol be turned up tightly against the work.

In Figure et there is shown a modified form 'of the lock, whichincludes the length I' of Wire 20, bent into square form for encircling the nut 12',A and connected to an eye'80 21, vformed at one corner of the wire frame 20, is one end of a coil spring 13', the other end of the spring 'being formed with a hooked portion 22, similar to the hookedl end 19, of the first form, and engaged with the hook 18', of thevpawl 16'. This spring 13' does not encircle the bolt, as does the spring 13, but is drawn around the bolt, as shown in Figure 4. The effect on the nut 12', and the pawl 16' isthe same as in the other forms. The tension of the' spring 13' is regulated by the nut 15', which is constructed, arranged, and operated in a manner identical with that of the nut 15.

What is claimed is:

1. In a nut lock, the combination with a bolt and its work engaging nut, of a spring means engaged with the nut for urging the latter against 'the work, means threaded on the bolt and' operatively connected with an end ofthe spring means for'regulating the tension of the spring means, and locking means on the threaded means for automatic engagement with the threads of the bolt.

2. In a nut'lock, the combination with a bolt and its work engaging nut, of a spring encircling the bolt and having one end connected with the nut, an auxiliary nut on V the bolt, means on the auxiliary nut for engagement with the bolt to prevent retrograde movement of the last-named nut, the other end of the spring being engaged with the last-nained means for ui'gng the said means lnto engagelnent With the bolt and at the same tiine ul'ging the Werk engaging nut against the Work.

3. In a nut look, the combination With a bolt and its Work engagim` nut, of a eoil spring,` encl'eling the thl'eaded pol-'Lion of the bolt and having' one end exnhi'acing, the nut,

bolt and its Work engaging: nut', ofe, a eoil spring' eneirchng thebolt an'd having. one end einbi'aelng the nut, an auxihal'y nut engaged on the bolt, and a paWl pivotally car l'ied by the auxiliary nut and engaged With the-threads of the bolt, said pawl having a hooked end, and the other end of the spring having, a' hooked: end engaged With the hooked end of the pawl for ul'ging the pawi into engagelnentwith the bolt' andthe Work eng'aging nut` against the Work;

In testimeny whereo'fll affixany signature.

DANIEL e'. KERR; 

